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"A year ago today you hit send on an email that had a monumental effect on several people's lives. Mine, my husband's, my daughter's, both our parents and families, our friends.

"The level of detail that you went into, felt like it had been curated to inflict pain. You knew what a wife would need to hear to get her to the point of no return in her marriage and you delivered it, blow by blow.

"Sometimes I wonder how much of it was him trying to find what he had lost in me. I was once a cute blonde in a short skirt behind the bar at his favourite pub.

"Ten years later I was the mum in the yoga pants with the silver regrowth and bags under her eyes from being up all night with a sick baby. He was supposed to love that version of me too."

At the time she found out, Ms Maree was predominantly a stay-at-home mum.

While she was studying to be a life coach, Ms Maree also filled her days by blogging, running a CV-writing business and spending one day a week in an office.

"My husband was away a lot for work," she said.

"But generally, he always came home at the weekends.

"I remember feeling awful for him missing out on our daughter... It had been hard for us to adjust to parenthood. We didn't expect to fall pregnant so quickly, and I had hoped that my husband might be around more," Ms Maree said.

"I knew he was being distant, and I felt that when he came home from being away he was often really cranky and tired. I wanted to feel connected with him, so I suggested counselling.

"He agreed, and in a few months, we were really starting to get back on track. Then, I found out about the affair."

Carlie Maree wrote a powerful letter to her husband's mistress. Photo / Facebook